An adaptive forging control system and method for a four-hammer radial forging hydraulic press

Abstract

The present invention provides an adaptive forging control system and method for a four-hammer radial forging hydraulic press, including a PLC control system, an HMI human-machine interface, a logic motion controller, a displacement sensor and a laser thermometer, wherein the displacement sensor is arranged on the hammer forging unit, the laser thermometer is fixedly arranged above the frame, the hammer forging units are four, the hammer forging unit includes a hammer and a master cylinder, the master cylinder is connected to the oil supply port of the hydraulic pump station through a pipeline, and a servo proportional valve and a pressure sensor are arranged on the pipeline; the HMI human-machine interface, the logic motion controller, the pressure sensor and the laser thermometer are all connected to the PLC control system by electrical signals, and the servo proportional valve and the displacement sensor are all connected to the logic motion controller by electrical signals. The PLC control system is used to freely combine the hammer forging units according to the model parameters of the workpiece product, so as to realize free switching between round shaft workpieces and heterosexual workpieces in batch forging.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic control of a free forging hydraulic press, and in particular relates to an adaptive forging control system and method for a four-hammer radial forging hydraulic press. Background Art

[0002] In the process of continuous multi-pass forging of workpieces, forging accuracy and forging frequency control are crucial links to improve the performance of forgings. At present, the existing four-hammer radial forging hydraulic presses require four hammers to run synchronously during forging, and the workpieces to be finished are mostly shaft forgings. The product types are relatively single, and it is impossible to freely combine multiple hammers to facilitate the processing of heterogeneous alloy forgings.

[0003] In addition, the forging control methods of the four-hammer radial forging hydraulic press mainly include forging volume control and frequency control. At present, the forging frequency and forging volume are basically given by manual experience. In the actual forging finishing process, the forging frequency often fails to follow the set value, resulting in equipment forging failure or alarm. It is also common that the pressure has reached the maximum value of the forging press and cannot meet the forging volume requirements, resulting in a "stuck car" phenomenon. After these problems occur, they all need to be modified by manual experience. The operation is cumbersome, the accuracy and stability are not high, and it is easy to cause damage to the machine body. Its forging control adaptability and automation are relatively low.

[0004] This operation cannot adaptively set the frequency and forging value according to the profile parameters, nor can it make corresponding adjustments in time according to the corresponding changes in forging pressure and frequency during the forging process to ensure the performance quality of the forging. Summary of the invention

[0005] The purpose of the present invention is to provide an adaptive forging control system for a four-hammer radial forging hydraulic press to overcome the above-mentioned technical problems existing in the prior art.

[0006] Another object of the present invention is to provide an adaptive forging control method for a four-hammer radial forging hydraulic press, which can dynamically and closed-loop adaptively match the forging amount and frequency of the current pass in real time according to the changes in forging pressure and forging temperature during the forging process, thereby ensuring the continuity of forging production and the accuracy and stability of forging control, and greatly improving the intelligent level of forging control of the four-hammer radial forging hydraulic press.

[0007] To this end, the technical solution provided by the present invention is as follows:

[0008] A self-adaptive forging control system for a four-hammer radial forging hydraulic press, comprising a PLC control system, an HMI human-machine interface, a logic motion controller, a displacement sensor and a laser thermometer, wherein the HMI human-machine interface stores a workpiece model and a workpiece process database, the laser thermometer is fixedly arranged above a frame, the number of the hammer forging units is four, the hammer forging units comprise a hammer and a master cylinder, the displacement sensor is arranged in the master cylinder, the hammer is connected to the active end of the master cylinder, the master cylinder is connected to the oil supply port of a hydraulic pump station through a pipeline, and a servo proportional valve and a pressure sensor are arranged on the pipeline;

[0009] The HMI human-machine interface, logic motion controller, pressure sensor and laser temperature meter are all connected to the PLC control system by electrical signals, and the servo proportional valve and displacement sensor are all connected to the logic motion controller by electrical signals.

[0010] The four hammer forging units are respectively an upper hammer forging unit, a lower hammer forging unit, a left hammer forging unit and a right hammer forging unit. The left hammer forging unit and the right hammer forging unit are symmetrically installed on the horizontal center line of the frame, and the upper hammer forging unit and the lower hammer forging unit are symmetrically installed on the vertical center line of the frame.

[0011] The workpiece model includes the corresponding relationship between the width, thickness, height of the workpiece to be forged and the number of hammer heads used and the product forging amount.

[0012] The process database includes alloy parameters and physical properties of the workpiece to be forged and the corresponding relationship with the forging frequency.

[0013] The HMI human-machine interface and motion logic controller communicate with the PLC controller via TCP / IP for data exchange.

[0014] The PLC control system comprises a controller, a digital quantity output module and an analog quantity input module. The digital quantity output module and the analog quantity input module are both connected to the PLC controller by electrical signals, and the PLC controller is electrically connected to the motion logic controller.

[0015] An adaptive forging control method for a four-hammer radial forging hydraulic press adopts an adaptive forging control system for a four-hammer radial forging hydraulic press, comprising the following steps:

[0016] Step 1) Input the model of the workpiece to be forged on the HMI human-machine interface, and the PLC control system automatically selects the number of hammers required for forging the workpiece according to the width, thickness and height of the workpiece to be forged, and obtains the forging amount L, the maximum forging pressure limit P and the forging frequency F according to the workpiece process database;

[0017] Step 2) The PLC control system feeds back the forging amount L and the forging frequency F to the control value of the logic motion controller, starts the current forging, and records the workpiece temperature T1 measured by the laser thermometer;

[0018] Step 3) During the forging process, the PLC control system monitors in real time the values ​​of the pressure sensors and displacement sensors of the hammers of each hammer forging unit during the process of pressurizing to the forging amount, and adjusts in real time the actual pressure value within the range of the forging pressure maximum value P and the forging amount of this pass. After determining the forging amount of this pass, the forging frequency corresponding to the forging amount of this pass is determined, and the workpiece temperature T1 measured by the laser thermometer is recorded. The logic motion controller monitors the actual forging frequency change per unit time in real time and compares it with the forging frequency of this pass until the actual forging frequency reaches the forging frequency of this pass, and the forging of this pass is completed;

[0019] Step 4) When the forging amount of this pass does not reach the set forging amount L or the forging frequency does not reach the set forging frequency F, and the temperature of the workpiece is greater than the workpiece temperature T1, the next pass cycle is entered until the forging amount L and the forging frequency F are met, the forging cycle ends, and the workpiece forging is completed.

[0020] When the PLC control system detects that the value of the pressure sensor exceeds the maximum limit P of the forging pressure and the forging amount has not reached the given value L, the PLC control system determines to reduce the forging amount of this pass to L1, and the forging frequency is reduced to F1. At the same time, the PLC controller transmits the new forging amount L1 and forging frequency F1 to the logical motion controller. The logical motion controller controls the hammer head to forge the workpiece to complete the forging of this pass. After that, the PLC control system obtains the current temperature of the workpiece and compares it. When the current temperature of the workpiece is greater than the workpiece temperature T1, the PLC control system controls to enter the next forging cycle until the forging amount L and forging frequency F are met. The forging cycle ends and the forging of the workpiece is completed.

[0021] The workpieces include round shaft workpieces and special-shaped workpieces.

[0022] The beneficial effects of the present invention are:

[0023] The four-hammer radial forging hydraulic press adaptive forging control system provided by the present invention freely combines each hammer forging unit according to the model parameters of the workpiece product through the PLC control system, thereby realizing free switching between round shaft workpieces and special-shaped workpieces in batch forging.

[0024] The present invention calculates the required forging amount and forging frequency of the workpiece according to the workpiece model stored in the HMI human-machine interface through a PLC control system, and adaptively matches the forging amount and forging frequency of each pass according to the change of the forging pressure limit value and the frequency parameter value, and adjusts the adaptive value of the servo proportional valve in real time and dynamically in a closed loop to ensure the accuracy of the performance quality of the forgings and the stability of the mechanical equipment, thereby greatly improving the intelligent level of the adaptive forging control of the four-hammer radial forging hydraulic press.

[0025] Compared with the prior art, the invention has reasonable design, excellent process, high intelligence and adaptability. It realizes the intelligent combination of the hammer forging units of the four-hammer radial forging hydraulic press, and the corresponding forging volume and forging frequency are adaptively matched, which promotes the development of diversified forging workpiece types, improves the production efficiency of the forging hydraulic press and the performance quality of the workpiece products, and greatly reduces labor and production costs.

[0026] In order to make the above contents of the present invention more clearly understood, preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a plan view of an embodiment of the present invention;

[0028] Figure 2 It is the principle block diagram of PLC control system and logic motion controller;

[0029] Figure 3 It is a control flow chart of the present invention.

[0030] In the figure:

[0031] Description of reference numerals:

[0032] 1. Left hammer forging unit; 2. Right hammer forging unit; 3. Upper hammer forging unit; 4. Lower hammer forging unit; 5. Laser thermometer; 6. PLC control system; 7. HMI human-machine interface; 8. Logic motion controller; 9. Workpiece; 10. Hydraulic pump station; 101. Left hammer; 102. Left master cylinder; 103. Displacement sensor of left hammer master cylinder; 104. Pressure sensor of left hammer master cylinder; 105. Servo proportional valve of left hammer master cylinder; 201. Right hammer; 202. Right master cylinder ; 203, right hammer master cylinder displacement sensor; 204, right hammer master cylinder pressure sensor; 205, right hammer master cylinder servo proportional valve; 301, upper hammer; 302, upper master cylinder; 303, upper hammer master cylinder displacement sensor; 304, upper hammer master cylinder pressure sensor; 305, upper hammer master cylinder servo proportional valve; 401, lower hammer; 402, lower master cylinder; 403, lower hammer master cylinder displacement sensor; 404, lower hammer master cylinder pressure sensor; 405, lower hammer master cylinder servo proportional valve. DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0034] It should be noted that, in the present invention, the up, down, left and right in the figure are regarded as the up, down, left and right of the adaptive forging control system of the four-hammer radial forging hydraulic press described in this specification.

[0035] The exemplary embodiments of the present invention are now described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0036] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0037] Embodiment 1:

[0038] The present embodiment provides an adaptive forging control system for a four-hammer radial forging hydraulic press, comprising a PLC control system 6, an HMI human-machine interface 7, a logic motion controller 8, a displacement sensor and a laser thermometer 5, wherein the HMI human-machine interface 7 stores a workpiece 9 model and a workpiece 9 process database, the displacement sensor is arranged on a hammer forging unit, the laser thermometer 5 is fixedly arranged above a frame, the hammer forging units are four, the hammer forging unit comprises a hammer and a master cylinder, the displacement sensor is arranged in the master cylinder, the hammer is connected to the active end of the master cylinder, the master cylinder is connected to the oil supply port of a hydraulic pump station 10 through a pipeline, and a servo proportional valve and a pressure sensor are arranged on the pipeline;

[0039] The HMI human-machine interface 7 , logic motion controller 8 , pressure sensor and laser temperature meter 5 are all connected to the PLC control system 6 by electrical signals, and the servo proportional valve and displacement sensor are all connected to the logic motion controller 8 by electrical signals.

[0040] Specifically, the working process or application process of the control system provided in this embodiment is as follows:

[0041] First, the model of the workpiece 9 to be forged is input on the HMI human-machine interface 7. The PLC control system 6 automatically selects the appropriate number of hammers for forging the workpiece 9 according to the width, thickness and height of the profile, and derives the forging amount L, the maximum forging pressure limit P and the optimal forging frequency F parameters according to the type of alloy elements of the workpiece 9 and the process requirements; then the PLC controller in the PLC control system 6 feeds back the forging amount and forging frequency to the control value of the logic motion controller 8, and the automatic forging of this pass starts.

[0042] During the forging process, the PLC controller monitors in real time the changes in the corresponding pressure sensor values ​​of each hammer head during the process of pressurizing to the forging amount. When the pressure value exceeds the limit and the forging amount has not yet reached the given value L, each hammer head quickly returns and correspondingly reduces the given forging amount value of the next hammer head to a new value. At the same time, the PLC controller transmits the new forging value to the logic motion controller 8 to continue the forging of the next hammer head. During this cyclic forging process, the PLC controller adjusts the forging value in real time according to the comparison between the actual pressure value and the pressure limit value until the actual pressure value changes within the limited range. The PLC controller can determine the forging amount L1 of this pass.

[0043] When the forging amount of this pass is determined, the logic motion controller 8 monitors the actual forging frequency change per unit time in real time and compares it with the given frequency. When the given frequency is not reached, the given value of the forging frequency is reduced accordingly and the next hammer forging cycle is entered accordingly. During the forging process of this cycle, the PLC controller compares the actual forging frequency with the given value in real time and adjusts the given frequency in time until the two are consistent. The PLC controller determines the forging frequency F1 of this pass. The PLC controller records the temperature T1 of the workpiece 9 when the forging amount and forging frequency of this pass are determined (the temperature of the workpiece 9 when forging starts). After the forging of this pass is completed, the PLC controller compares the forging amount L1 and forging frequency F1 of this pass with the required forging amount L and forging frequency F. If one of them does not meet the required value of the workpiece 9 and the current temperature of the workpiece 9 is greater than the temperature T1 of the workpiece 9, the PLC control system 6 enters the next forging cycle, and the pass is forged in a continuous cycle until the forging amount L and forging frequency F requirements are met, and the forging cycle ends.

[0044] Among them, the motion logic controller is used to control the opening of the servo proportional valve corresponding to each hammer forging unit in real time according to the displacement change of each hammer head in a closed loop to quickly respond to the forging frequency requirements. In each forging pass, a dynamic balance is always maintained between the forging amount given by each hammer head and the pressure value of the forging unit system, as well as the forging frequency given by each hammer head and the corresponding servo proportional valve.

[0045] Embodiment 2:

[0046] Based on Example 1, this embodiment provides an adaptive forging control system for a four-hammer radial forging hydraulic press, wherein the four hammer forging units are an upper hammer forging unit 3, a lower hammer forging unit 4, a left hammer forging unit 1 and a right hammer forging unit 2, wherein the left hammer forging unit 1 and the right hammer forging unit 2 are symmetrically installed on the horizontal center line of the frame, and the upper hammer forging unit 3 and the lower hammer forging unit 4 are symmetrically installed on the vertical center line of the frame.

[0047] like Figure 1 As shown, the upper hammer forging unit 3 includes an upper hammer 301 and an upper master cylinder 302, and an upper hammer master cylinder displacement sensor 303 is installed in the upper master cylinder 302 for real-time monitoring of the position change of the upper hammer 301; the lower hammer forging unit 4 includes a lower hammer 401 and a lower master cylinder 402, and a lower hammer master cylinder displacement sensor 403 is installed in the lower master cylinder 402 for real-time monitoring of the position change of the lower hammer 401; the left hammer forging unit 1 includes a left hammer 101 and a left master cylinder 102, and a left hammer master cylinder displacement sensor 103 is installed in the left master cylinder 102 for real-time monitoring of the position change of the left hammer 101; the right hammer forging unit 2 includes a right hammer 201 and a right master cylinder 202, and a right hammer master cylinder displacement sensor 203 is installed in the right master cylinder 202 for real-time monitoring of the position change of the right hammer 201.

[0048] The upper hammer 301, the lower hammer 401, the left hammer 101 and the right hammer 201 are arranged on the frame at an interval of 90 degrees, and the intersection of the axes of the four hammers is the workpiece to be forged 9. The upper master cylinder 302, the lower master cylinder 402, the left master cylinder 102 and the right master cylinder 202 are connected in parallel with the oil supply port of the hydraulic pump station 10 through pipelines, and each pipeline is respectively provided with an upper hammer master cylinder pressure sensor 304 and an upper hammer master cylinder servo proportional valve 305, a lower hammer master cylinder pressure sensor 404 and a lower hammer master cylinder servo proportional valve 405, a left hammer master cylinder pressure sensor 104 and a left hammer master cylinder servo proportional valve 105, a right hammer master cylinder pressure sensor 204 and a right hammer master cylinder servo proportional valve 205. Each hammer forging unit controls the servo proportional valve opening response in real time through a motion logic controller, thereby controlling the hydraulic oil to enter and exit each master cylinder to drive the hammer to perform pressurized return reciprocating motion.

[0049] Embodiment 3:

[0050] Based on Example 1, this example provides an adaptive forging control system for a four-hammer radial forging hydraulic press, wherein the workpiece 9 model includes the corresponding relationship between the width, thickness, height of the workpiece 9 to be forged and the number of hammers used and the product forging amount.

[0051] The adaptive forging control system of the four-hammer radial forging hydraulic press provided by the present invention can realize both finishing and lengthening of round shaft workpieces and forging of special-shaped parts through the PLC control system 6 according to the parameters such as the shape of the workpiece 9 product and the number of hammers used for forging. In addition, the corresponding forging amount and forging frequency in each forging pass are adaptively matched, which improves the forging production efficiency and the performance quality of the workpiece 9 product, and greatly reduces labor and production costs.

[0052] Embodiment 4:

[0053] On the basis of Example 1, this embodiment provides an adaptive forging control system for a four-hammer radial forging hydraulic press, wherein the process database includes alloy parameters and physical properties of the workpiece 9 to be forged and the corresponding relationship with the forging frequency.

[0054] According to the type of alloy elements of the workpiece 9 and the process requirements, the forging amount L, the maximum forging pressure limit P and the optimal forging frequency F are obtained. During the forging process, the forging amount and forging frequency of the current pass are matched dynamically and closed-loop adaptively according to the changes in forging pressure and forging temperature in real time to ensure the continuity of forging production and the accuracy and stability of forging control, greatly improving the intelligent level of forging control of the four-hammer radial forging hydraulic press.

[0055] Embodiment 5:

[0056] On the basis of Example 1, this embodiment provides an adaptive forging control system for a four-hammer radial forging hydraulic press, wherein the HMI human-machine interface 7 and the motion logic controller communicate with the PLC controller via TCP / IP for data exchange.

[0057] like Figure 2 As shown, each part is connected in series into a network through TCP / IP Ethernet communication to share data.

[0058] Embodiment 6:

[0059] Based on Example 1, this embodiment provides an adaptive forging control system for a four-hammer radial forging hydraulic press, wherein the PLC control system 6 includes a controller, a digital output module and an analog input module, wherein the digital output module and the analog input module are both electrically connected to the PLC controller by signals, and the PLC controller is electrically connected to the motion logic controller.

[0060] like Figure 2As shown, the digital output module is electrically connected to the pump head valve of the hydraulic pump station 10, the analog input module is electrically connected to the upper hammer head master cylinder pressure sensor 304, the lower hammer head master cylinder pressure sensor 404, the left hammer head master cylinder pressure sensor 104 and the right hammer head master cylinder pressure sensor 204, the PLC controller is connected to the logic motion controller 8 through TCP / IP communication, the logic motion controller 8 is electrically connected to the upper hammer head master cylinder servo proportional valve 305, the lower hammer head master cylinder servo proportional valve 405, the left hammer head master cylinder servo proportional valve 105 and the right hammer head master cylinder servo proportional valve 205, as well as the upper hammer head master cylinder displacement sensor 303, the lower hammer head master cylinder displacement sensor 403, the left hammer head master cylinder displacement sensor 103 and the right hammer head master cylinder displacement sensor 203.

[0061] In this embodiment, the PLC control system 6 is mainly based on the Siemens 6ES7 315-2PN / DP controller, and each part is connected in series into a network and data is shared through the TCP / IP Ethernet communication method. The feedback signals of the laser thermometer 5 and the pressure sensors corresponding to each hammer forging unit (including the upper hammer master cylinder pressure sensor 304, the lower hammer master cylinder pressure sensor 404, the left hammer master cylinder pressure sensor 104 and the right hammer master cylinder pressure sensor 204) are all 4~20ma current signals, and the analog input module (model 6ES7 331-7KF02-0AB0) in the PLC control system 6 converts its analog pressure signals into digital pressure signals and transmits them to the controller. The feedback value of each displacement sensor and the opening degree of each servo proportional valve are controlled by the motion logic controller RMC75E of DELTA Corporation of the United States. The output setting of the pump head valve of the hydraulic pump station 10 is completed by the digital output module (model 6ES7322-1BL00-0AA0) in the PLC control system 6. The operating parameters of the HMI human-machine interface 7 and the logic motion controller 8 exchange data with the PLC controller through TCP / IP communication.

[0062] Embodiment 7:

[0063] This embodiment provides an adaptive forging control method for a four-hammer radial forging hydraulic press, which uses an adaptive forging control system for a four-hammer radial forging hydraulic press, and includes the following steps:

[0064] Step 1) Input the model of the workpiece 9 to be forged on the HMI human-machine interface 7, and the PLC control system 6 automatically selects the number of hammers required for forging the workpiece 9 according to the width, thickness and height of the workpiece 9 to be forged, and obtains the forging amount L, the maximum forging pressure limit P and the forging frequency F according to the process database of the workpiece 9;

[0065] Step 2) The PLC control system 6 feeds back the forging amount L and the forging frequency F to the control value of the logic motion controller 8, and starts the current forging;

[0066] Step 3) During the forging process, the PLC control system 6 monitors in real time the values ​​of the pressure sensors and displacement sensors of the hammers of each hammer forging unit during the process of pressurizing to the forging amount, and adjusts in real time the actual pressure value within the range of the forging pressure limit maximum value P and the forging amount of this pass. After determining the forging amount of this pass, the forging frequency corresponding to the forging amount of this pass is determined, and the temperature T1 of the workpiece 9 measured by the laser thermometer 5 is recorded. The logic motion controller 8 monitors in real time the actual forging frequency change per unit time and compares it with the forging frequency of this pass until the actual forging frequency reaches the forging frequency of this pass, and the forging of this pass is completed;

[0067] Step 4) When the forging amount of this pass does not reach the set forging amount L or the forging frequency does not reach the set forging frequency F, and the temperature of the workpiece 9 is greater than the temperature T1 of the workpiece 9 at this time, the next pass cycle is entered until the forging amount L and the forging frequency F are met, the forging cycle ends, and the forging of the workpiece 9 is completed.

[0068] When the forging amount of this pass reaches the set forging amount L and the forging frequency reaches the set forging frequency F, the forging of the workpiece 9 is completed. If the forging amount of this pass does not reach the set forging amount L or the forging frequency does not reach the set forging frequency F, and the temperature of the workpiece 9 is lower than the temperature T1 of the workpiece 9 at this time, the workpiece 9 needs to be returned to the furnace for forging again. The purpose of reaching the set forging frequency is to achieve the flatness of the forged part and meet the product requirements.

[0069] Each pressure sensor is used to monitor the forging pressure of each hammer head. The forging amount of this pass is set by the PLC control system 6, which monitors the value of each pressure sensor and the change of the displacement sensor in real time to achieve real-time dynamic adjustment. The forging frequency of this pass is set by the PLC control system 6, which monitors the actual forging frequency value changes collected in the logic motion controller 8 to achieve real-time dynamic adjustment.

[0070] When the forging amount is given, the logic motion controller 8 gives the opening degree of each servo proportional valve, thereby controlling and determining the running speed of each hammer driven by the extension and contraction of each master cylinder. When the displacement sensors detect that the running speed is reduced or less than the running speed corresponding to the opening degree of each servo proportional valve, it means that the given forging amount cannot be achieved, and the forging amount needs to be adjusted.

[0071] Embodiment 8:

[0072] On the basis of Example 7, this embodiment provides an adaptive forging control method for a four-hammer radial forging hydraulic press. When the PLC control system 6 detects that the value of the pressure sensor exceeds the maximum value P of the forging pressure limit and the forging amount has not yet reached the given value L, the PLC control system 6 determines to reduce the forging amount of this pass to L1, and the forging frequency is reduced to F1. At the same time, the PLC controller transmits the new forging amount L1 and forging frequency F1 to the logical motion controller 8. The logical motion controller 8 controls the hammer to forge the workpiece 9 to complete the forging of this pass. After that, the PLC control system 6 obtains the current temperature of the workpiece 9 and compares it. When the current temperature of the workpiece 9 is greater than the temperature T1 of the workpiece 9, the PLC control system 6 controls to enter the next forging cycle until the forging amount L and the forging frequency F are met. The forging cycle ends and the forging of the workpiece 9 is completed. Figure 3 shown.

[0073] After the current forging pass is completed, whether the next pass is to be carried out is determined by comparing the forging amount and forging frequency with the process value and the numerical change of the temperature of the workpiece 9.

[0074] Embodiment 9:

[0075] On the basis of Example 7, this embodiment provides an adaptive forging control method for a four-hammer radial forging hydraulic press, wherein the workpiece 9 includes a round shaft workpiece and a special-shaped workpiece.

[0076] The present invention uses the PLC control system 6 to intelligently combine the number of hammers used for forging according to parameters such as the shape of the workpiece 9 product, so as to achieve both finishing and lengthening of round shaft workpieces and forging of special-shaped parts. In addition, the corresponding forging amount and forging frequency in each forging pass are adaptively matched, which improves the forging production efficiency and the performance quality of the workpiece 9 product, and greatly reduces labor and production costs.

[0077] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An adaptive forging control method for a four-hammer radial forging hydraulic press, using an adaptive forging control system for a four-hammer radial forging hydraulic press, characterized in that: The following steps are involved: Step 1) inputting a model of a workpiece (9) to be forged on an HMI human-machine interface (7), the PLC control system (6) automatically selects the number of hammers required for forging the workpiece (9) according to the width, thickness and height of the workpiece (9), and obtains the forging amount L, the maximum forging pressure limit P and the forging frequency F according to the process database of the workpiece (9); Step 2) the PLC control system (6) feeds back the forging amount L and the forging frequency F to the control value of the logic motion controller (8), starts the current forging, and records the temperature T1 of the workpiece (9) measured by the laser thermometer (5); Step 3) During the forging process, the PLC control system (6) monitors in real time the value of the pressure sensor and the value of the displacement sensor of each hammer forging unit during the process of pressurizing the hammer head to the forging amount, and adjusts in real time the actual pressure value within the range of the forging pressure limit maximum value P and the forging amount of the current pass. After determining the forging amount of the current pass, the forging frequency corresponding to the forging amount of the current pass is determined, and the temperature T1 of the workpiece (9) measured by the laser thermometer (5) is recorded. The logic motion controller (8) monitors in real time the actual forging frequency change per unit time and compares it with the forging frequency of the current pass until the actual forging frequency reaches the forging frequency of the current pass, and the forging of the current pass is completed; Step 4) when the forging amount of the current pass does not reach the set forging amount L or the forging frequency does not reach the set forging frequency F, and the temperature of the workpiece (9) at this time is greater than the temperature T1 of the workpiece (9), then the next pass cycle is entered until the forging amount L and the forging frequency F are met, the forging cycle ends, and the forging of the workpiece (9) is completed; The adaptive forging control system of the four-hammer radial forging hydraulic press comprises a PLC control system (6), an HMI human-machine interface (7), a logic motion controller (8), a displacement sensor and a laser thermometer (5), wherein the HMI human-machine interface (7) stores a workpiece (9) model and a workpiece (9) process database, the laser thermometer (5) is fixedly mounted above the frame, the number of the hammer forging units is four, the hammer forging units comprise a hammer and a master cylinder, the displacement sensor is arranged in the master cylinder, the hammer is connected to the active end of the master cylinder, the master cylinder is connected to the oil supply port of the hydraulic pump station (10) through a pipeline, and a servo proportional valve and a pressure sensor are arranged on the pipeline; The HMI human-machine interface (7), the logic motion controller (8), the pressure sensor and the laser temperature measuring instrument (5) are all connected to the PLC control system (6) via electrical signals, and the servo proportional valve and the displacement sensor are all connected to the logic motion controller (8) via electrical signals.

2. The adaptive forging control method of a four-hammer radial forging hydraulic press according to claim 1, characterized in that: When the PLC control system (6) detects that the value of the pressure sensor exceeds the maximum value P of the forging pressure limit and the forging amount has not yet reached the given value L, the PLC control system (6) determines to reduce the forging amount of this pass to L1 and the forging frequency to F1. At the same time, the PLC controller transmits the new forging amount value L1 and the forging frequency F1 to the logic motion controller (8). The logic motion controller (8) controls the hammer head to forge the workpiece (9) to complete the forging of this pass. After that, the PLC control system (6) obtains the current temperature of the workpiece (9) and compares it. When the current temperature of the workpiece (9) is greater than the temperature T1 of the workpiece (9), the PLC control system (6) controls to enter the next forging cycle until the forging amount L and the forging frequency F are met. The forging cycle ends and the forging of the workpiece (9) is completed.

3. The adaptive forging control method of a four-hammer radial forging hydraulic press according to claim 1, characterized in that: The workpieces (9) include round shaft workpieces and heterogeneous workpieces.

4. The adaptive forging control method of a four-hammer radial forging hydraulic press according to claim 1, characterized in that: The four hammer forging units are respectively an upper hammer forging unit (3), a lower hammer forging unit (4), a left hammer forging unit (1) and a right hammer forging unit (2); the left hammer forging unit (1) and the right hammer forging unit (2) are symmetrically mounted on the horizontal center line of the frame, and the upper hammer forging unit (3) and the lower hammer forging unit (4) are symmetrically mounted on the vertical center line of the frame.

5. The adaptive forging control method of a four-hammer radial forging hydraulic press according to claim 1, characterized in that: The workpiece (9) model includes the corresponding relationship between the width, thickness, height of the workpiece (9) to be forged and the number of hammer heads used and the product forging amount.

6. The adaptive forging control method of a four-hammer radial forging hydraulic press according to claim 1, characterized in that: The process database includes alloy parameters and physical properties of the workpiece (9) to be forged and a corresponding relationship with the forging frequency.

7. The adaptive forging control method of a four-hammer radial forging hydraulic press according to claim 1, characterized in that: The HMI human-machine interface (7) and the motion logic controller both communicate with the PLC controller via TCP / IP for data exchange.

8. The adaptive forging control method of a four-hammer radial forging hydraulic press according to claim 1, characterized in that: The PLC control system (6) comprises a controller, a digital quantity output module and an analog quantity input module, wherein the digital quantity output module and the analog quantity input module are both electrically connected to the PLC controller, and the PLC controller is electrically connected to the motion logic controller.

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